Matryoshka Dolls - Update...

So far I have received one correct answer, but there is still time until Sunday for you to crack the puzzle…

There might be some confusion about the two images, the original jpg and the modified ppm file.  Don’t worry about the difference in cropping, this isn’t significant.

How do you know you are at the end of this rabbit hole?  The command will be recognizable to anyone who has seen “2001: A Space Odyssey”.